Wet and Dry

[chimpy_bob]

Another person has managed to reverse into me. By car seems to be a magnet for bad drivers.
When I last had it repaired under the other persons insurance, because they could not match the colour, they applied wet and dry sandpaper to the car, then polished it. The result was great. No sign of any damage.
This time it is not an insurance job and would like to attempt this myself as its only a few minor chips. Has anyone got any tips on the grade of sandpaper etc. Also whether from sandpaper, to go straight to polish or do I need to do something in between?
Any help would be great.